Developer Tools
Decrypt AES ciphertext instantly with the same passphrase.
Use this AES Decrypt tool to reverse AES-encrypted Base64 text using the original passphrase. It is useful for browser-side decryption tests, reversible development workflows, encrypted sample validation, and confirming that AES-encrypted values can be decoded back into readable text correctly.
Use this AES Decrypt tool to reverse AES-encrypted Base64 text using the original passphrase. It is useful for browser-side decryption tests, reversible development workflows, encrypted sample validation, and confirming that AES-encrypted values can be decoded back into readable text correctly.
Use aes decrypt when you need a fast browser-based result without extra setup. It works well for quick checks, one-off tasks, and routine formatting or calculation work.
Read step-by-step usage guidance, best practices, and common mistakes.
See common questions and answers about input, output, and tool usage.
Review practical input and output examples before running the tool.
Find similar and supporting tools for adjacent actions and follow-up tasks.
Input
secret123 Base64 encrypted text
Output
hello world
Useful for reversing an AES-encrypted sample.
Input
demo-key Base64 encrypted text
Output
{"name":"John","role":"admin"} Useful for checking that encrypted structured text returns correctly.
Fix: Use the exact same passphrase that was used during encryption.
Fix: Paste valid Base64 ciphertext produced by the matching AES encrypt workflow.
Fix: Put the passphrase first and the ciphertext below it.
Fix: This usually means the passphrase or ciphertext format is wrong.
Fix: Use the matching decrypt tool for the actual cipher.
It decrypts AES Base64 ciphertext back into readable text.
Yes. The exact same passphrase is required.
Use the Base64 ciphertext produced by the matching AES encrypt flow.
The most common reasons are the wrong passphrase or invalid ciphertext format.
The reverse tool is AES Encrypt.